Health officials are now warning Americans to "take precautions" after insects in Arizona tested positively for the bubonic plague. Although northern Arizona had an extremely wet winter in terms of both rain and snowfall, summer temperatures have been mostly above average.

Humans and animals can get infected with the plague through the bite of an infected flea.

Navajo County advises people to watch for sudden die-offs of groups of prairie dogs or rodents, which might be an indicator of the plague. Once in a human host, it can cause bubonic plague, what you learned about in high school with the swelling of the lymph nodes, but also septicemic plague and pneumonic plague.

Watch a Yankees fan deflate during Devers' home runThey would be on an 11-game winning streak if not for the Yankees' five-run rally in the eighth inning of last Friday's game. The day before, Montgomery was hit on the head by a fly ball while signing autographs as the Red Sox took batting practice.

Image credit: Geneticliteracyproject.org / History ThingsPlague is usually found in western parts of the U.S. Almost all of the infections occurred in the American West (including California, Arizona, New Mexico, Colorado, and Oregon). Cats with plague can also pass the disease on to humans directly thorough respiratory droplets. Plague is a bigger problem in places that have a harder time shutting down outbreaks.